PART 1 of 5
This is Part 1 of the Allergy and
Immunology Fundamentals 2nd
Edition Comprehensive Test Bank by
Klimov.
TABLE OF CONTENTS — PART 1 of 5
Chapter 1: Functional Organization of the Immune System — Questions 1–20
Chapter 2: Innate Immunity — Questions 21–40
Chapter 3: Adaptive Immunity — Questions 41–60
Chapter 4: Immunological Hypersensitivity Reactions — Questions 61–80
Chapter 5: Diagnostic Immunology — Questions 81–100
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Q1. A nursing student is studying the functional organization of the immune system. Which primary
lymphoid organ is responsible for T lymphocyte maturation?
A. Bone marrow
B. Thymus
C. Spleen
D. Lymph node
Correct Answer: Thymus ✅
Rationale: The thymus is the primary lymphoid organ responsible for T lymphocyte maturation
and selection. Immature T cells migrate from the bone marrow to the thymus, where they undergo
,positive and negative selection to ensure self-tolerance and functional competence. The bone
marrow is the primary site for B lymphocyte maturation in humans. The spleen and lymph nodes are
secondary lymphoid organs where mature lymphocytes encounter antigens and initiate immune
responses. Understanding the distinction between primary and secondary lymphoid organs helps
nurses explain how immune cells develop and where immune responses are generated.
Q2. A patient is diagnosed with a primary immunodeficiency affecting B cell function. Which
immunoglobulin class is most commonly reduced in this condition?
A. Immunoglobulin G
B. Immunoglobulin M
C. Immunoglobulin E
D. Immunoglobulin D
Correct Answer: Immunoglobulin G ✅
Rationale: Immunoglobulin G (IgG) is the most commonly reduced immunoglobulin class in
primary immunodeficiencies affecting B cell function, such as common variable immunodeficiency
and X-linked agammaglobulinemia. IgG is the most abundant immunoglobulin in serum and provides
long-term protection against infections. Immunoglobulin M (IgM) is the first antibody produced in an
immune response, immunoglobulin E (IgE) is associated with allergic reactions and parasite defense,
and immunoglobulin D (IgD) functions primarily as a B cell receptor. Understanding immunoglobulin
classes and their functions helps nurses interpret laboratory results and recognize patterns of
immunodeficiency.
Q3. A nurse is teaching a patient about the immune system. Which cell type is primarily responsible
for presenting antigens to T cells?
A. Dendritic cell
B. Neutrophil
C. Eosinophil
D. Mast cell
Correct Answer: Dendritic cell ✅
,Rationale: Dendritic cells are the most potent antigen-presenting cells and are primarily
responsible for presenting antigens to T cells. They capture antigens in peripheral tissues, migrate to
secondary lymphoid organs, and present processed antigen fragments on major histocompatibility
complex molecules to naïve T cells. Neutrophils are phagocytic cells that respond to acute bacterial
infections. Eosinophils are involved in parasitic infections and allergic reactions. Mast cells release
histamine and other mediators in allergic responses. Understanding the role of dendritic cells in
antigen presentation helps nurses explain the initiation of adaptive immune responses.
Q4. A patient with a parasitic infection is being evaluated for immune function. Which cell type is
primarily responsible for defense against helminths?
A. Eosinophil
B. Neutrophil
C. Basophil
D. Natural killer cell
Correct Answer: Eosinophil ✅
Rationale: Eosinophils are primarily responsible for defense against helminths (parasitic
worms). They release cytotoxic granules that damage the parasite surface and are recruited to sites
of parasitic infection by cytokines such as interleukin-5. Neutrophils are primarily responsible for
defense against bacteria and fungi. Basophils are involved in allergic reactions and release histamine.
Natural killer cells are primarily responsible for killing virus-infected cells and tumor cells.
Understanding the specific roles of different immune cells helps nurses recognize clinical patterns
associated with infections and immune deficiencies.
Q5. A nurse is reviewing the complement system with a colleague. Which complement component is
most important for opsonization of bacteria?
A. C3b
B. C5a
C. C3a
D. C9
Correct Answer: C3b ✅
, Rationale: C3b is the most important complement component for opsonization of bacteria.
Opsonization is the process by which pathogens are coated with molecules that enhance their
recognition and engulfment by phagocytes. C3b binds to bacterial surfaces and interacts with
complement receptors on phagocytes, facilitating phagocytosis. C5a and C3a are anaphylatoxins that
promote inflammation and recruit immune cells. C9 is part of the membrane attack complex that
forms pores in bacterial membranes. Understanding complement functions helps nurses explain
immune defense mechanisms and recognize complement deficiencies.
Q6. A patient is being evaluated for recurrent infections. Which immunoglobulin is most important
for mucosal immunity?
A. Immunoglobulin A
B. Immunoglobulin G
C. Immunoglobulin M
D. Immunoglobulin E
Correct Answer: Immunoglobulin A ✅
Rationale: Immunoglobulin A (IgA) is the most important immunoglobulin for mucosal
immunity. It is secreted across mucosal surfaces and provides protection against pathogens at
respiratory, gastrointestinal, and genitourinary sites. IgA prevents pathogen adherence and
neutralizes toxins without triggering inflammatory responses. Immunoglobulin G (IgG) is the most
abundant serum immunoglobulin and provides systemic immunity. Immunoglobulin M (IgM) is the
first antibody produced in an immune response. Immunoglobulin E (IgE) is associated with allergic
reactions and parasite defense. Understanding the role of IgA in mucosal immunity helps nurses
recognize conditions associated with IgA deficiency.
Q7. A nurse is teaching about the immune response to a viral infection. Which cell type is primarily
responsible for killing virus-infected cells?
A. Cytotoxic T lymphocyte
B. Helper T lymphocyte
C. Regulatory T lymphocyte
D. B lymphocyte
This is Part 1 of the Allergy and
Immunology Fundamentals 2nd
Edition Comprehensive Test Bank by
Klimov.
TABLE OF CONTENTS — PART 1 of 5
Chapter 1: Functional Organization of the Immune System — Questions 1–20
Chapter 2: Innate Immunity — Questions 21–40
Chapter 3: Adaptive Immunity — Questions 41–60
Chapter 4: Immunological Hypersensitivity Reactions — Questions 61–80
Chapter 5: Diagnostic Immunology — Questions 81–100
---
Q1. A nursing student is studying the functional organization of the immune system. Which primary
lymphoid organ is responsible for T lymphocyte maturation?
A. Bone marrow
B. Thymus
C. Spleen
D. Lymph node
Correct Answer: Thymus ✅
Rationale: The thymus is the primary lymphoid organ responsible for T lymphocyte maturation
and selection. Immature T cells migrate from the bone marrow to the thymus, where they undergo
,positive and negative selection to ensure self-tolerance and functional competence. The bone
marrow is the primary site for B lymphocyte maturation in humans. The spleen and lymph nodes are
secondary lymphoid organs where mature lymphocytes encounter antigens and initiate immune
responses. Understanding the distinction between primary and secondary lymphoid organs helps
nurses explain how immune cells develop and where immune responses are generated.
Q2. A patient is diagnosed with a primary immunodeficiency affecting B cell function. Which
immunoglobulin class is most commonly reduced in this condition?
A. Immunoglobulin G
B. Immunoglobulin M
C. Immunoglobulin E
D. Immunoglobulin D
Correct Answer: Immunoglobulin G ✅
Rationale: Immunoglobulin G (IgG) is the most commonly reduced immunoglobulin class in
primary immunodeficiencies affecting B cell function, such as common variable immunodeficiency
and X-linked agammaglobulinemia. IgG is the most abundant immunoglobulin in serum and provides
long-term protection against infections. Immunoglobulin M (IgM) is the first antibody produced in an
immune response, immunoglobulin E (IgE) is associated with allergic reactions and parasite defense,
and immunoglobulin D (IgD) functions primarily as a B cell receptor. Understanding immunoglobulin
classes and their functions helps nurses interpret laboratory results and recognize patterns of
immunodeficiency.
Q3. A nurse is teaching a patient about the immune system. Which cell type is primarily responsible
for presenting antigens to T cells?
A. Dendritic cell
B. Neutrophil
C. Eosinophil
D. Mast cell
Correct Answer: Dendritic cell ✅
,Rationale: Dendritic cells are the most potent antigen-presenting cells and are primarily
responsible for presenting antigens to T cells. They capture antigens in peripheral tissues, migrate to
secondary lymphoid organs, and present processed antigen fragments on major histocompatibility
complex molecules to naïve T cells. Neutrophils are phagocytic cells that respond to acute bacterial
infections. Eosinophils are involved in parasitic infections and allergic reactions. Mast cells release
histamine and other mediators in allergic responses. Understanding the role of dendritic cells in
antigen presentation helps nurses explain the initiation of adaptive immune responses.
Q4. A patient with a parasitic infection is being evaluated for immune function. Which cell type is
primarily responsible for defense against helminths?
A. Eosinophil
B. Neutrophil
C. Basophil
D. Natural killer cell
Correct Answer: Eosinophil ✅
Rationale: Eosinophils are primarily responsible for defense against helminths (parasitic
worms). They release cytotoxic granules that damage the parasite surface and are recruited to sites
of parasitic infection by cytokines such as interleukin-5. Neutrophils are primarily responsible for
defense against bacteria and fungi. Basophils are involved in allergic reactions and release histamine.
Natural killer cells are primarily responsible for killing virus-infected cells and tumor cells.
Understanding the specific roles of different immune cells helps nurses recognize clinical patterns
associated with infections and immune deficiencies.
Q5. A nurse is reviewing the complement system with a colleague. Which complement component is
most important for opsonization of bacteria?
A. C3b
B. C5a
C. C3a
D. C9
Correct Answer: C3b ✅
, Rationale: C3b is the most important complement component for opsonization of bacteria.
Opsonization is the process by which pathogens are coated with molecules that enhance their
recognition and engulfment by phagocytes. C3b binds to bacterial surfaces and interacts with
complement receptors on phagocytes, facilitating phagocytosis. C5a and C3a are anaphylatoxins that
promote inflammation and recruit immune cells. C9 is part of the membrane attack complex that
forms pores in bacterial membranes. Understanding complement functions helps nurses explain
immune defense mechanisms and recognize complement deficiencies.
Q6. A patient is being evaluated for recurrent infections. Which immunoglobulin is most important
for mucosal immunity?
A. Immunoglobulin A
B. Immunoglobulin G
C. Immunoglobulin M
D. Immunoglobulin E
Correct Answer: Immunoglobulin A ✅
Rationale: Immunoglobulin A (IgA) is the most important immunoglobulin for mucosal
immunity. It is secreted across mucosal surfaces and provides protection against pathogens at
respiratory, gastrointestinal, and genitourinary sites. IgA prevents pathogen adherence and
neutralizes toxins without triggering inflammatory responses. Immunoglobulin G (IgG) is the most
abundant serum immunoglobulin and provides systemic immunity. Immunoglobulin M (IgM) is the
first antibody produced in an immune response. Immunoglobulin E (IgE) is associated with allergic
reactions and parasite defense. Understanding the role of IgA in mucosal immunity helps nurses
recognize conditions associated with IgA deficiency.
Q7. A nurse is teaching about the immune response to a viral infection. Which cell type is primarily
responsible for killing virus-infected cells?
A. Cytotoxic T lymphocyte
B. Helper T lymphocyte
C. Regulatory T lymphocyte
D. B lymphocyte
